[SOLVED] Which stack would worth better regarding cost and scalability ? PHP, Node, ASP.NET

Hi guys. I have a project (startup) that could and up with petabytes of data in long term if it will be successful. So I am concerning here about technology that I should use to leverage the basics.

My concerns are the costs (machines, os, licence price) because of big data.

I would prefer the .NET stack with SQL server but the license prices are a bit huge (or not ?). I am open for the LAMP or MEAN too.

In house knowledge is not a problem at this moment. Except I don't have any experience with the costs and prices in a BIG DATA sense. Here is where I need your help. Thanks.